ARP1258A QUALIFICATION OF HYDRAULIC TUBE JOINTS TO SPECIFIED FLEXURE FATIGUE REQUIREMENTS

This recommended practice establishes the method for qualification testing of tube joints and fitting attachments, using the flexure test method described in ARP 1185. This qualification test method requires the determination of S-N type curves except that tube deflections are plotted versus the number of test cycles, as illustrated in AIR 1418. This is an alternate to flexure testing to a single stress level as specified in MIL-F-18280.